For Summer McIntosh of Canada, it’s one gold medal won at the swimming world championships with four to go. McIntosh is aiming to win five gold medals in individual events at the worlds, and the ...

For Summer McIntosh of Canada, it’s one gold medal won at the swimming world championships with four to go. McIntosh is aiming to win five gold medals in individual events at the worlds, and the ...

McIntosh, of Canada, opened the world swimming championships in Singapore with a dominant win in the 400-meter freestyle — the first of five events she hopes to claim gold in.

For Ledecky, a nine-time Olympic gold medalist, it was her 27th medal in the world championships in an astonishing career.